Answer:
In the long run, all factors of production are variable.
While, in the short run, some factors of production are variable, while at least one factor of production is fixed.
Explanation:
Variable cost is cost that varies with output. If output is zero, no variable cost would be incurred. An example of variable cost is wages
Fixed cost is cost that does not vary with output. An example of fixed cost is rent
In the long run, all factors of production are variable. While, in the short run, some factors of production are variable, while at least one factor of production is fixed.